In TermRangeQuerys, QueryParser tries to detect date values, e.g.
date:[6/1/2005 TO 6/4/2005] produces a range query that searches
for "date" fields between 2005-06-01 and 2005-06-04. Note that the format
of the accepted input depends on the locale.
A DateTools.Resolution has to be set,
if you want to use DateTools for date conversion.